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State of the Practice in the Design of Tall, Stiff and Flexible Tieback

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State of the Practice in the Design of Tall, Stiff and Flexible Tieback this document downloaded from Terms and Conditions of Use: All of the information, data and computer software (“information”) presented on this web site is for general vulcanhammer.net information only. While every effort will be made to insure its accuracy, this information should not be used or relied on Since 1997, your complete for any specific application without independent, competent online resource for professional examination and verification of its accuracy, suitability and applicability by a licensed professional. Anyone information geotecnical making use of this information does so at his or her own risk and assumes any and all liability resulting from such use. engineering and deep The entire risk as to quality or usability of the information contained within is with the reader. In no event will this web foundations: page or webmaster be held liable, nor does this web page or its webmaster provide insurance against liability, for The Wave Equation Page for any damages including lost profits, lost savings or any other incidental or consequential damages arising from Piling the use or inability to use the information contained within. Online books on all aspects of This site is not an official site of Prentice-Hall, soil mechanics, foundations and Pile Buck, the University of Tennessee at marine construction Chattanooga, or Vulcan Foundation Equipment. All references to sources of software, equipment, parts, service Free general engineering and or repairs do not constitute an geotechnical software endorsement. And much more... Visit our companion site http://www.vulcanhammer.org ERDC/ITL TR-01-1 Innovations for Navigation Projects Research Program State of the Practice in the Design of Tall, Stiff, and Flexible Tieback Retaining Walls Ralph W. Strom and Robert M. Ebeling December 2001 Information Technology Laboratory Laboratory Technology Information Approved for public release; distribution is unlimited. The contents of this report are not to be used for advertising, pub- lication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. The findings of this report are not to be construed as an official Department of the Army position, unless so designated by other authorized documents. PRINTED ON RECYCLED PAPER Innovations for Navigation Projects ERDC/ITL TR-01-1 Research Program (TR INP-01-4) December 2001 State of the Practice in the Design of Tall, Stiff, and Flexible Tieback Retaining Walls by Ralph W. Strom 9474 SE Carnaby Way Portland, OR 97266 Robert M. Ebeling Information Technology Laboratory U.S. Army Engineer Research and Development Center 3909 Halls Ferry Road Vicksburg, MS 39180-6199 Final report Approved for public release; distribution is unlimited Prepared for U.S. Army Corps of Engineers Washington, DC 20314-1000 Under INP Work Unit 33272 Contents List of Figures...................................................................................................... vii List of Tables .......................................................................................................xii Preface ................................................................................................................ xiv 1—Introduction...................................................................................................... 1 1.1 General ...................................................................................................... 1 1.2 FHWA Research and Development on Anchored Walls .......................... 2 1.3 Application of FHWA Research to the Design of Corps Tieback Wall Systems ............................................................................................ 3 1.4 Tieback Wall Deformations, Earth Pressures, and Drainage Effects........ 3 1.4.1 General............................................................................................. 3 1.4.2 Wall stiffness effects........................................................................ 4 1.4.3 Relation between earth pressures and wall movements................... 4 1.4.4 Construction short-term, construction long-term, and postconstruction conditions............................................................. 6 1.5 State of the Practice................................................................................... 9 1.5.1 General............................................................................................. 9 1.5.2 Flexible tieback wall systems ........................................................ 12 1.5.3 Stiff tieback wall systems .............................................................. 12 1.5.4 Common methods of tieback wall analysis ................................... 12 1.5.5 Comprehensive analysis ................................................................ 16 2—Tieback Wall Systems ................................................................................... 18 2.1 Introduction............................................................................................. 18 2.2 Vertical Sheet-Pile System with Wales and Post-Tensioned Tieback Anchors..................................................................................... 21 2.3 Soldier Beam System with Wood Lagging and Post-Tensioned Tieback Anchors..................................................................................... 22 2.4 Secant Cylinder Pile System with Post-Tensioned Tieback Anchors..... 23 2.5 Continuous Reinforced Concrete Slurry Wall System with Post-Tensioned Tieback Anchors................................................... 24 2.6 Soldier Beam Tremie Concrete System with Post-Tensioned Tieback Anchors................................................................................................... 27 2.7 Continuous Versus Discrete Tieback Wall Systems ............................... 28 3—Tieback Wall Design and Design Standards.................................................. 31 3.1 General .................................................................................................... 31 3.2 Behavior of Tieback Wall Systems......................................................... 31 3.2.1 General........................................................................................... 31 iii 3.2.2 Tieback wall construction sequencing........................................... 32 3.2.3 General behavior and design methodologies—focus wall systems .................................................................................. 35 3.3 Tieback Wall Design and Analysis Procedures ...................................... 38 3.3.1 General........................................................................................... 38 3.3.2 RIGID analysis procedure ............................................................. 40 3.3.3 WINKLER analysis....................................................................... 41 3.3.4 Linear elastic and nonlinear finite element method analyses ........ 42 3.3.5 Additional analyses........................................................................ 44 3.4 Phased Approach..................................................................................... 44 3.5 Performance Objectives .......................................................................... 46 3.5.1 General........................................................................................... 46 3.5.2 Collapse prevention ....................................................................... 46 3.5.3 Serviceability performance............................................................ 47 3.5.4 Displacement control performance................................................ 48 3.6 Design Policy .......................................................................................... 48 3.7 Combination of Loads............................................................................. 48 3.7.1 General........................................................................................... 48 3.7.2 Allowable stress design of steel components ................................ 48 3.7.3 Ultimate strength design of reinforced concrete components........ 49 3.7.4 Special provisions for hydraulic structures.................................... 49 3.8 Applicable Design Codes and Standards................................................. 50 3.8.1 General........................................................................................... 50 3.8.2 Special provisions of ASD applicable to tieback wall systems.......................................................................................... 53 3.8.3 Anchors.......................................................................................... 53 3.8.4 Anchor bond lengths...................................................................... 54 3.8.5 External stability............................................................................ 54 3.8.6 Axial capacity of soldier beams..................................................... 54 3.8.7 Tieback wall toe capacity .............................................................. 54 4—Geotechnical Investigations and Testing ....................................................... 55 4.1 Objectives................................................................................................ 55 4.2 Subsurface Exploration and Site Characterization.................................. 56 4.3 Testing of Foundation Materials ............................................................
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